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Expired Canadian patentCanada

Valve housing

CA 1238031 A · Owner: Voroshilovgradsky Mashinostroitelny Institut · Inventors: Markuntovich, Felix D.; Gladky, Petr V.; Bragin, Boris F.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure A valve housing has butt pipes for connection to a pipeline for defining therewith a passage for a flow of a fluid being conveyed, preferably of a slurry. A plurality of ribs are provided along the passage on the lower portion of the wall thereof, each rib extending transversely of the passage. Each rib is of a tear-shaped configuration in its section taken along the longitudinal centerline of the passage a the enlarged portion of the rib facing toward the incoming flow of a fluid being conveyed.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 18, 1984
GrantedJune 14, 1988
Term endedJune 14, 2005
Patent numberCA 1238031 A
Classification (IPC)F16K27/04

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedJan 18, 1984Patent grantedJune 14, 1988Term endedJune 14, 2005

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.